Interim Software Engineer, Kotlin £630 p/d

Interim Software Engineer, Kotlin £630 p/d

• Location

  London

• Sector:

• Job type:

• Salary:

  £600 - £630 per day + Inside IR35

• Contact:

  Claire Shipman

• Contact email:

  claire.shipman@1st-executive.com

• Job ref:

  J692549_1779956819

• Published:

  about 6 hours ago

• Duration:

  6 Months

• Expiry date:

  2026-06-27

• Startdate:

  ASAP

Interim Software Engineer - Kotlin

Rate: £630 p/d (Inside IR35)

Duration: 6-month Contract

Location: London (Hybrid)

Client: Investment Banking Technology

An Interim Senior Software Engineer, to join a high-performing front-office engineering team delivering a next-generation cloud-native issuance platform for global capital markets.

This platform is replacing a legacy bookbuilding system used by investment banking teams worldwide and supports high-volume, real-time workflows during critical trading windows. The engineering environment is collaborative, fast-paced, and strongly aligned to Extreme Programming (XP) principles.

The Role

This is a hands-on senior engineering position focused on designing, building, and evolving backend services in Kotlin within a modern cloud-native architecture.

You will work closely with engineers, product specialists, and business stakeholders to deliver resilient, scalable solutions that support real-time issuance and allocation workflows.

The role places strong emphasis on:

• Mob programming
• Test-driven development (TDD)
• Continuous refactoring
• Collective ownership
• Incremental delivery
• Production excellence

Key Responsibilities

• Design, develop, and maintain backend services in Kotlin
• Contribute to event-driven and event-sourced platform architecture
• Collaborate within mob programming sessions as a primary delivery model
• Deliver high-quality, well-tested, maintainable code
• Support and improve production systems with strong reliability requirements
• Participate in CI/CD and SDLC practices within an enterprise environment
• Work closely with stakeholders to deliver incremental business features
• Use incidents and operational feedback to improve system resilience and design
  

Required Skills & Experience

• Strong commercial experience building backend services using Kotlin
• Deep understanding of event-driven and/or event-sourced architectures
• Extensive experience with XP engineering practices
• Strong cloud engineering experience within GCP environments
• Experience working within regulated or enterprise-scale environments
• Comfortable supporting high-availability production systems
• Strong communication and collaboration skills

This is an opportunity to work on a business-critical platform used globally, within a modern Cloud-native engineering environment.

Note: Applicants must hold current and valid UK Right to Work

If interested, please apply asap and any questions, email claire.shipman@1st-executive.com